Method for copolymerization of alpha-methyl styrene (AMS) and maleic anhydride (MAn)

A technology of methyl styrene and maleic anhydride, which is applied in the field of copolymerization of α-methyl styrene and maleic anhydride, can solve problems such as narrow particle size distribution, achieve narrow particle size distribution, simple process system, and predictable morphology control effect

Inactive Publication Date: 2009-11-18
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the present invention can prepare the maleic anhydride and α-methylstyrene alternating copolymer microsphere that contains reactive anhydride group, in the dispersion system of this polymer microsphere, the surface of monodisperse polymer microsphere is clean, particle size Controllable, narrow particle size distribution, and can solve the disadvantages caused by the need to use stabilizers in traditional dispersion polymerization systems

Method used

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  • Method for copolymerization of alpha-methyl styrene (AMS) and maleic anhydride (MAn)
  • Method for copolymerization of alpha-methyl styrene (AMS) and maleic anhydride (MAn)
  • Method for copolymerization of alpha-methyl styrene (AMS) and maleic anhydride (MAn)

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Embodiment 1

[0057]The molar ratio of MAn and AMS is 1:1, wherein MAn is 0.6139g, AMS is 0.7387g; the initiator is AIBN, 0.0329g; the medium is isoamyl acetate, 40mL. Adopt water-bath heating, react 6 hours under the temperature of 70 ℃, obtain the average particle diameter (Dn), dispersion coefficient (U) and polymerization conversion rate (C) of PMSMA copolymer microspheres p ), and the number average molecular weight (Mn) results of the polymer are shown in Table 1.

Embodiment 2

[0059] The molar ratio of MAn and AMS is 1:1, wherein MAn is 1.2258g, AMS is 1.4773g; the initiator is AIBN, 0.0329g; the medium is isoamyl acetate, 40mL. Adopt water-bath heating, react 6 hours under the temperature of 70 ℃, obtain the average particle diameter (Dn), dispersion coefficient (U) and polymerization conversion rate (C) of PMSMA copolymer microspheres p ), and the number average molecular weight (Mn) results of the polymer are shown in Table 1.

Embodiment 3

[0061] The molar ratio of MAn and AMS is 1:1, wherein MAn is 2.4515g, AMS is 2.9545g; the initiator is AIBN, 0.0329g; the medium is isoamyl acetate, 40mL. Adopt water-bath heating, react 6 hours under the temperature of 70 ℃, obtain the average particle diameter (Dn), dispersion coefficient (U) and polymerization conversion rate (C) of PMSMA copolymer microspheres p ), and the number average molecular weight (Mn) results of the polymer are shown in Table 1. Scanning electron micrographs of polymer microspheres are shown in figure 1 .

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Abstract

The invention provides a method for preparing an alternating copolymer of alpha-methyl styrene (AMS) and maleic anhydride (MAn), belonging to the high molecular precipitation polymerization field. The method comprises the following steps: taking the mixed solution which is formed by respectively mixing organic acid alkyl ester or ketone with alkane as reaction medium, taking organic peroxide or azo compound as an initiator to initiate monomer AMS to copolymerize MAn and preparing the copolymer microsphere of the AMS and MAn; wherein, the copolymer microsphere features uniform grain diameter and monodispersity. The method has simple process and can synthesize good dispersion system featuring uniform grain diameter and even dispersion.

Description

technical field [0001] The invention relates to a method for copolymerizing alpha-methylstyrene (AMS) and maleic anhydride (MAn). Utilize the method of the present invention, can obtain the colloid of the copolymer of milky white α-methylstyrene and maleic anhydride under the condition of not adding any stabilizer, the disperse phase of colloid is the polymer microsphere of monodisperse, and polymer is spherical Composed of alternating copolymers of α-methylstyrene and maleic anhydride. Background technique [0002] α-Methylstyrene (AMS), maleic anhydride (MAn) copolymer is a new type of polymer material with low price and high potential value, which is widely used in additives for organic glass, latex coatings, and modifiers for plastic products , and used to improve the processability of materials and other fields. Among them, α-methylstyrene is a by-product produced when the cumene method co-produces phenol and acetone, and has high economic value. [0003] In addition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/08C08F212/08C08F2/14
Inventor 邓建元陈铖杨万泰
Owner BEIJING UNIV OF CHEM TECH
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